The `X Factor` judge sticks to the same routine every day which includes regular exercise, breakfast in bed and at least four beers in the evening.
He told People magazine: "I`ll do 500 push-ups in a day religiously, and if I can I like to have a workout. Then I have a steam and a bath but I always have breakfast in bed.
"A workday starts around 1 or 2 in the afternoon. I have a weird routine. I`ll have a massage and then I`ll have four or five beers ice cold . then I`ll carry on until 4 or 5 in the morning and that kind of keeps me awake."
Simon admits he`s obsessed with being clean so has at least three baths a day and hates his house to be in a mess.
He said: "I`m obsessed with cleanliness for myself, so I will take a bath three times a day, sometimes a steam twice a day in addition to that. And the same thing in the house. I don`t like clutter. That`s why I think I`d find it difficult to have kids.
"Your house, I think, defines your mind. If you come into something which is chaotic, it means your head is chaotic, and I can`t work that way."